Institute for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, United Kingdom.
Sport, Exercise and Health Research Center, Newman University Birmingham, Birmingham, United Kingdom.
J Strength Cond Res. 2020 Oct;34(10):2947-2955. doi: 10.1519/JSC.0000000000002673.
Morris, RO, Jones, B, Myers, T, Lake, J, Emmonds, S, Clarke, ND, Singleton, D, Ellis, M, and Till, K. Isometric midthigh pull characteristics in elite youth male soccer players: Comparisons by age and maturity offset. J Strength Cond Res 34(10): 2947-2955, 2020-The purpose of this study was to (a) provide comparative isometric midthigh pull (IMTP) force-time characteristics for elite youth soccer players and (b) determine the effect of age and maturation on IMTP force-time characteristics. Elite male youth soccer players (U12 n = 51; U13 n = 54; U14 n = 56; U15 n = 45; U16 n = 39; and U18 n = 48) across 3 maturity offset groups (Pre n = 117; circa n = 84; and Post-peak height velocity n = 92) performed 2 maximal IMTP trials on a portable force platform (1,000 Hz). Absolute and relative values for peak force (PF) and impulse over 100 and 300 ms were analyzed. A full Bayesian regression model was used to provide probable differences similar to that of a frequentist p value. Advanced age and maturation resulted in superior IMTP force-time characteristics. Peak force demonstrated high probabilities of a difference between all consecutive age groups (p > 0.95). For absolute and relative impulse (100 and 300 ms), only 2 consecutive age groups (U14-15's and U16-18's) demonstrated high probabilities of a difference (p > 0.95) with large effects (d = 0.59-0.93). There were high probable differences between all maturity offset groups for PF and impulse with medium to large effects (d = 0.56-3.80). These were also reduced when expressed relative to body mass (relative PF and relative impulse). This study provides comparative IMTP force-time characteristics of elite male youth soccer players. Practitioners should consider individual maturation status when comparing players given the impact this has on force expression.
莫里斯、罗、琼斯、B、迈尔斯、T、雷克、J、埃蒙兹、S、克拉克、ND、辛格尔顿、D、埃利斯、M 和蒂尔、K. 优秀青年男性足球运动员的等长大腿中部牵拉特征：按年龄和成熟度偏移的比较。J 力量与调节研究 34（10）：2947-2955，2020-本研究的目的是：（a）为优秀青年足球运动员提供等长大腿中部牵拉（IMTP）的力量-时间特征比较；（b）确定年龄和成熟度对 IMTP 力量-时间特征的影响。精英男青年足球运动员（U12n=51；U13n=54；U14n=56；U15n=45；U16n=39；U18n=48）分为 3 个成熟度偏移组（Pre n=117；Circa n=84；Post-peak height velocity n=92），在便携式力量平台上进行了 2 次最大等长大腿中部牵拉试验（1000Hz）。分析了峰值力（PF）和 100ms 和 300ms 时冲量的绝对值和相对值。使用全贝叶斯回归模型提供类似于频繁 p 值的可能差异。年龄较大和成熟度较高导致更好的 IMTP 力量-时间特征。峰值力在所有连续年龄组之间均有高度可能存在差异（p＞0.95）。对于绝对和相对冲量（100ms 和 300ms），只有 2 个连续年龄组（U14-15 和 U16-18）具有高度可能存在差异（p＞0.95），差异较大（d=0.59-0.93）。所有成熟度偏移组之间的 PF 和冲量都有高度可能存在差异，差异中等至较大（d=0.56-3.80）。当相对于体重表达时，这些差异也会减小（相对 PF 和相对冲量）。本研究提供了优秀男性青年足球运动员的等长大腿中部牵拉力量-时间特征。由于成熟度对力量表达的影响，从业者在比较运动员时应考虑个人的成熟状态。
